FAN HAVING WATERPROOF CONSTRUCTION

摘要

PROBLEM TO BE SOLVED: To provide a fan of simple construction having waterproof construction wherein its posture or orientation during use is not limited. SOLUTION: An end 47 of a cylindrical external wall 45 of a motor support 29 and an end 88 of a wall 87 on which a blade of an impeller 83 is mounted are shaped so that the end 47 of a cylindrical external wall 45 of the motor support 29 may be located outside the end 88 of the wall 87 on which the blade is mounted and that a gap G comprising a labyrinth construction is formed between the ends 48 and 88. A flange member 57 having a ring-like flange 55 extending outward in the radial direction is fixed to an end 53 of a cylindrical internal wall 51 of the motor support 29. The length in the axial direction of the cylindrical internal wall 51 is determined so that the ring-like flange 55 is located closer to a suction opening 15 than to an external opening G1 of the gap G.